Abstract
We developed an experimental platform for combinative use of an X-ray free electron laser (XFEL) and a high-power nanosecond laser. The main target of the platform is an investigation of matter under high-pressure states produced by a laser-shock compression. In this paper, we show details of the experimental platform, including XFEL parameters and the focusing optics, the laser irradiation system and X-ray diagnostics. As a demonstration of the high-power laser-pump XFEL-probe experiment, we performed an X-ray diffraction measurement. An in-situ single-shot X-ray diffraction pattern expands to a large angle side, which shows a corundum was compressed by laser irradiation.
Highlights
The pink beam, which preserves the original spontaneous emission (SASE)-X-ray free electron laser (XFEL) spectrum, has the bandwidth of ~5 × 10−3 and provides the largest photon number in the all operation modes, which is more than 1011 photons/pulse
We developed a new experimental platform where one can use both an XFEL and a high‐power nanosecond laser
The platform is optimized for the experiments to probe the laser‐shocked matter withSci
Summary
X-ray free electron lasers (XFELs) [1,2,3,4,5] open up new scientific frontiers in various fields [6,7,8,9]. High-pressure science combining high-power laser-shock compression and single-shot probing with an XFEL pulse is expected to enable observation of matters in an extreme condition. Instantaneous ultrahigh-pressure states generated with high-power laser irradiation can be investigated with XFEL. For this purpose, experimental systems for the combination of XFEL and high-power laser have been developed at the Linac Coherent Light Source [14] and the European XFEL [15]. Angstrom Compact Free Electron Laser (SACLA), a prototypical experimental system was utilized for observing lattice dynamics in a tantalum foil irradiated with a 1-J class sub-nanosecond laser [16]. We report the development of a new experimental platform for combinative use of XFEL and the 100-J class laser in SACLA
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